Linux: Add support for custom cursor themes

chrome/browser/ui/libgtk2ui/gtk2_ui.h

Index: chrome/browser/ui/libgtk2ui/gtk2_ui.h
diff --git a/chrome/browser/ui/libgtk2ui/gtk2_ui.h b/chrome/browser/ui/libgtk2ui/gtk2_ui.h
index cd5d8af9dd154cfbc93de583ce8833864650b035..fa7f2688ec036b094a1ac49b19dd484d10785e0c 100644
--- a/chrome/browser/ui/libgtk2ui/gtk2_ui.h
+++ b/chrome/browser/ui/libgtk2ui/gtk2_ui.h
@@ -134,6 +134,9 @@ class Gtk2UI : public views::LinuxUI {
   // ThemeService interface and the colors we send to webkit.
   void LoadGtkValues();
 
+  // Initialize the Xcursor theme and size with the GTK theme and size.
+  void LoadCursorTheme();
+
   // Updates colors if necessary after possible modification of command line.
   // TODO(varkha): This should not be necessary once Material Design is on
   // unconditionally.